EP0543823B1 - Rasierklingeneinheit - Google Patents

Rasierklingeneinheit Download PDF

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Publication number
EP0543823B1
EP0543823B1 EP91910844A EP91910844A EP0543823B1 EP 0543823 B1 EP0543823 B1 EP 0543823B1 EP 91910844 A EP91910844 A EP 91910844A EP 91910844 A EP91910844 A EP 91910844A EP 0543823 B1 EP0543823 B1 EP 0543823B1
Authority
EP
European Patent Office
Prior art keywords
blade
twin
edges
strips
razor head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91910844A
Other languages
English (en)
French (fr)
Other versions
EP0543823A4 (de
EP0543823A1 (de
Inventor
Graham John Simms
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gillette Co LLC
Original Assignee
Gillette Co LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gillette Co LLC filed Critical Gillette Co LLC
Publication of EP0543823A4 publication Critical patent/EP0543823A4/de
Publication of EP0543823A1 publication Critical patent/EP0543823A1/de
Application granted granted Critical
Publication of EP0543823B1 publication Critical patent/EP0543823B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/54—Razor-blades
    • B26B21/56—Razor-blades characterised by the shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/08—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor involving changeable blades
    • B26B21/14—Safety razors with one or more blades arranged transversely to the handle
    • B26B21/22—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously
    • B26B21/222—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit
    • B26B21/227—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit with blades being resiliently mounted in the changeable unit

Definitions

  • the present invention concerns a twin-blade assembly according to the preamble of claim 1 for use in a safety razor.
  • the first type is the so-called "three piece razor” in which a double edged wafer blade is clamped in use between a blade cap and a blade platform at the upper end of a handle. When the blade is to be replaced, the razor is dismantled and the blade is removed and discarded. It has also been known to provide a razor with a replaceable tandem blade unit including two blades fastened together with fixed edges.
  • the present invention provides a twin-blade assembly of the aforesaid type characterized in that at least one blade member is resiliently flexible about an axis parallel with the blade edges to allow the relative positions of the blade edges to be set upon mounting the assembly in the razor head.
  • the blade members do not need to be accurately preset and the desired positions of the blade edges can be established by the razor head, which facilitates manufacture and accurate positioning of the edges with respect to the guard and cap provided on the razor head.
  • the construction of the blade assembly also has ecological advantages in that it can avoid the need to discard the blades with plastics cartridge components which are not biodegradable.
  • the twin blade assemblies of the invention may also include a strip of lubricating material e.g. of known form comprising a polymeric matrix and a hydrophilic material which forms a lubricant between the skin and the razor head in use.
  • a strip of lubricating material e.g. of known form comprising a polymeric matrix and a hydrophilic material which forms a lubricant between the skin and the razor head in use.
  • Figures 1 and 2 show a blade assembly comprising two separately formed blade members A and B, having sharpened cutting edges 1A, 1B, downturned legs 2A, 2B, a rear leg 3AB and clip portions 4A, 4B for retaining a strip of lubricating material M of the type described above.
  • Fig. 1 The assembly is shown in Fig. 1 in its free condition ready for insertion in a razor head, and in Fig. 2 mounted in a head in which the forward portions of the blade members are resiliently deflected to set the required attitudes and spacing, or span, of the edges 1A, 1B.
  • Fig. 3 shows one end portion of a flat blank of blade steel from which two members A and B are formed.
  • the blank is stamped and perforated, and its opposed longitudinal edges are sharpened and honed to form the cutting edges 1A, 1B.
  • Broken lines 10, 11 and 12 indicate the positions of subsequent shearing lines.
  • the blank is coated and sintered in the conventional fashion. As shown in Fig. 4, several operations are now performed.
  • the blank is sheared along the lines 10, 11 and 12.
  • the legs 2A and 2B are bent out of plane of the strip to give adequate stiffness to the outer margins, or blade strips 5A, 5B, which may be further stiffened by indenting diamond patterns 6 as the bends are made.
  • Leg 2A is bent down (relative to the plane of the paper) and leg 2B is bent up.
  • Fig. 8 shows an assembly complete with its strip M inserted and retained in the clips 4A, 4B.
  • the assembly will be firmly supported along the length of the rear leg 3A/B, but the blade strips 5A, 5B are connected to the rear portion of the unit by respective resilient L-shaped arms 9A, 9B which permit the strips 5A, 5B to be displaced essentially about axes parallel with the blade edges 1A, 1B, by resilient deflection of the arms 9A, 9B to the position shown in Fig. 2.
  • Fig. 9 shows, somewhat diagrammatically, a razor head specifically designed to receive the above described assembly. It comprises a moulded frame 11 carrying a guard bar 12 and cap member comprising a pair of end walls 13 integrally united by a rear bar 14 and pivotally mounted on the frame 11 at a pivot axis P.
  • the cap member is hinged rearwardly (anti-clockwise in Fig. 9) to open the razor head and thus permit insertion of a blade assembly with its rear leg 3A/B against the back of the frame.
  • the cap is then returned to the closed position indicated, engaging the extreme ends of the blade strips 5A, 5B to hold them in their required attitudes for shaving with the required span, or spacing, between the respective blade edges 1A, 1B.
  • the head may be designed to clamp the blade strips in this position, or it may permit their movement, independently of each other, against the restoring actions of the spring arms 9A, 9B in directions substantially perpendicular to the skin surface being shaved.
  • Fig. 10 illustrates in end elevation a slightly modified twin blade assembly in which the optional lubricating strip 205 is retained against rear supports 204 found only on the upper blade member 200B, the strip 205 being secured to the member 200B with adhesive.
  • Fig. 11 illustrates a razor head utilizing the twin blade assembly of Fig. 10, the razor head being generally similar to that of Fig. 9.
  • the main body 110 of the head is provided with arcuate bearing means 123 by which the head is attached to a razor handle for limited rocking movement about an axis parallel with the blade edges and close to them.
  • the body 110 carries a spring loaded guard member 112 which is biassed upwardly, i.e. against the skin, in use but which can be deflected downwardly in response to reaction forces encountered during shaving.
  • a cap member 115 is pivotable about a pivot axis P between an open position, illustrated in full lines in Fig. 11, and a closed operative position (shown in broken lines) in which inner flanges on the end walls 113 engage the blade edges and force the blade strips 205A, 205B into their normal operative positions, against the resilient restoring forces applied by the spring arms 209A, 209B.
  • the arms may be deflected further in use of the razor, in response to the varying reaction forces applied to the blade edges as they pass over the skin surfaces being shaved.
  • the razor illustrated in Fig. 12 and 13 is generally similar to those of Fig. 11, but in this razor head, provision is made for the guard member 212B to be resiliently displaced downwardly and rearwardly when subject to normal and drag forces encountered in use.
  • the twin blade assembly of Fig. 10 is shown mounted in a razor frame 210 having a pivotable cap 211 with end walls 206. When the cap position is closed, as shown in Fig. 12, the rear margins 203A/B of the blade member are turned down and clamped, the blade strips 205A, 205B being retained at their sharpened edges by the flanges on end walls 206 against which they are spring loaded by the strain energy in spring arms 209A, 209B.
  • the guard portion 212B is spring loaded upwardly and forwardly (i.e. upwardly and to the right as viewed in Figs. 12 and 13) but is displaceable against the spring forces, both downwardly in response to normal forces and rearwardly in response to drag forces acting essentially in opposition to the direction of shaving.
  • guard portion 212B In its medial region guard portion 212B has a rearwardly extending bumper 213 engageable with a bumper 218 which is attached to the leg 202A of the leading blade member and which is engageable in turn with the leg 202B of the rear blade member. If the guard portion 212B is displaced a sufficient distance rearwardly, as when encountering high drag forces, its bumper 213 engages the bumper 218 which in turn engages the leg 202B, causing both legs to be tilted rearwardly with concomitant flexure of the spring and 209A/B and consequent angling of the blade strip portions 205A/B in a clockwise sense, i.e. downwardly and forwardly, to reduce their respective shaving angles.
  • twin blade assemblies Some further possible variations in the twin blade assemblies are illustrated somewhat diagrammatically in Fig. 14 to 19 all being concerned with different means of stiffening the blade strips and particularly to increase their resistance to bending between their ends.
  • the respective blade members are indicated as A and B, with their blade strips at 305A and 305B, and downturned legs at 302A and 302B.
  • the strips 305A and B have bars 321 welded to their undersides and in Fig. 15 round wires 322 are welded to the blade members in the region of the "elbow" between the blade strips and the depending legs.
  • substituted angle-sections 323 are welded to the blade members.
  • Fig. 17 shows the legs 302A, 302B set at 90 o to the blade strips 305A, 305B and Fig.18, the blade members are impressed to form localised ribs 324.
  • FIG. 19 illustrates a version in which separately formed narrow blades 325 are welded to the blade strips 305A, 305B.

Claims (9)

  1. Doppelklingenzusammenbau zum Einsatz in einem Sicherheitsrasierer und mit zwei beabstandeten, parallelen, geschärften Schneidkanten, wobei der Zusammenbau zwei getrennt ausgebildete Klingenelemente (A, B, 200A, 200B) aus Metall umfaßt, die aneinander befestigt sind und die als eine Einheit in einem Rasiererkopf angebracht und ausgewechselt werden können, dadurch gekennzeichnet, daß mindestens ein Klingenelement (A, B; 200A, 200B) um eine zu den Klingenschneiden parallele Achse federnd elastisch ist, so daß die Winkellagen der Klingenschneiden (1A, 1B; 201A, 201B) nach der Anbringung des Zusammenbaus in dem Rasiererkopf festgestellt werden können.
  2. Doppelklingenzusammenbau nach Anspruch 1, dadurch gekennzeichnet, daß ein Streifen (M) aus einem Schmiermaterial dauerhaft an den Klingenelementen (A, B; 200A, 200B) angebracht ist.
  3. Doppelklingenzusammenbau nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß jedes der genannten Klingenelemente (A, B; 200A, 200B) einen Klingenrohling aus Stahl umfaßt, der so geformt ist, daß er einen longitudinalen hinteren Rand (3A/B; 203A/B) und einen longitudinalen Klingenstreifen (5A/B; 205A/B; 305A/B) mit geschärften Klingenschneiden (1A/B; 201A/B) bildet, wobei der Klingenstreifen mit einem Abstand zu dem hinteren Rand vor diesem angeordnet und mit diesem durch integrale Federarme (9A/B; 209A/B) verbunden ist, wobei die Arme um eine Achse bzw. um Achsen flexibel sind, die parallel zu den genannten Klingenschneiden (1A/B; 201A/B) ist bzw. sind.
  4. Doppelklingenzusammenbau nach Anspruch 3, dadurch gekennzeichnet, daß jedes der genannten Klingenelemente (A, B; 200A, 200B) einen Verstärkungsschenkel (2A/B; 202A/B; 302A/B) aufweist, der als integraler Teil des Rohlings ausgebildet ist und der sich aus der Ebene des Rohlings nach unten erstreckt, so daß zwischen dem genannten Klingenstreifen (5A/B) und dem genannten hinteren Rand (3A/B; 203A/B) ein Zwischenraum bzw. ein Spalt verbleibt.
  5. Doppelklingenzusammenbau nach Anspruch 4, dadurch gekennzeichnet, daß sich die beiden Klingen (A,B) überlagern, wobei sich der genannte Schenkel (2A) der oberen Klinge (A) nach unten durch den genannten Spalt der unteren Klinge (B) erstreckt.
  6. Doppelklingenzusammenbau nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Randbereiche der Klingenelemente (A,B), an denen die geschärften Schneiden ausgebildet sind, durch eine lokale Verformung (324) aus dem Material dieser Bereiche verstärkt werden, oder dadurch, daß zusätzliche Metallstreifen (321, 323) daran geschweißt werden.
  7. Rasiererkopf mit einem Doppelklingenzusammenbau nach Anspruch 3, in dem die Einheit entfernbar aufgenommen wird, wobei der Kopf einen Rahmen (11; 110; 210) mit einem Schutzriegel (12; 112; 212B) und eine Kappe umfaßt, die zwischen einer offenen Stellung, an der die Einführung der Einheit in den Kopf möglich ist, und einer geschlossenen, betriebsbereiten Stellung beweglich ist, an der die Einheit zwischen dem Rahmen (11; 110; 210) und der Kappe eingeklemmt wird, dadurch gekennzeichnet, daß das Schließen der Kappe eine charakteristische Verschiebung der Klingenstreifen (5A, 5B; 205A, 205B) bewirkt, wobei die Federarme (9A, 9B; 209A, 209B) entsprechend abgelenkt werden, so daß sich der Abstand zwischen den entsprechenden Klingenschneiden (201A/B) vergrößert.
  8. Rasiererkopf nach Anspruch 7, dadurch gekennzeichnet, daß die Klingenstreifen (5A,B; 205A,B) im geschlossenen Zustand des Rasiererkopfs eine eingeschränkte, voneinander unabhängige Bewegungsfreiheit in von der Hautoberfläche weggehende Richtungen aufweisen, und zwar gegen die federnde Rückstellwirkung der genannten Federarme (9A,9B; 209A,209B).
  9. Rasiererkopf nach Anspruch 7, dadurch gekennzeichnet, daß der genannte Schutzriegel (212B) als Reaktion auf normale, auf den Schutzriegel (212B) während der Rasur einwirkende Zugkräfte, von der Haut nach unten und nach hinten federnd verschiebbar ist, wobei die nach hinten gerichteten Bewegungen des Riegels (212B) auf die Klingenelemente (A,B) übertragen werden, so daß die Rasierwinkel der Klingenstreifen (205A, 205B) verringert werden.
EP91910844A 1990-06-12 1991-05-28 Rasierklingeneinheit Expired - Lifetime EP0543823B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB909013047A GB9013047D0 (en) 1990-06-12 1990-06-12 Safety razors
GB9013047 1990-06-12
PCT/US1991/003751 WO1991019596A1 (en) 1990-06-12 1991-05-28 Razor blade assembly

Publications (3)

Publication Number Publication Date
EP0543823A4 EP0543823A4 (de) 1993-02-17
EP0543823A1 EP0543823A1 (de) 1993-06-02
EP0543823B1 true EP0543823B1 (de) 1996-07-24

Family

ID=10677452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91910844A Expired - Lifetime EP0543823B1 (de) 1990-06-12 1991-05-28 Rasierklingeneinheit

Country Status (12)

Country Link
US (1) US5551153A (de)
EP (1) EP0543823B1 (de)
CN (1) CN1057225A (de)
AU (1) AU8066391A (de)
CS (1) CS180091A3 (de)
DE (1) DE69121103T2 (de)
GB (1) GB9013047D0 (de)
IE (1) IE911926A1 (de)
MA (1) MA22174A1 (de)
PT (1) PT97959A (de)
WO (1) WO1991019596A1 (de)
ZA (1) ZA914292B (de)

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Also Published As

Publication number Publication date
CS180091A3 (en) 1992-01-15
DE69121103T2 (de) 1997-02-27
EP0543823A4 (de) 1993-02-17
DE69121103D1 (de) 1996-08-29
MA22174A1 (fr) 1991-12-31
ZA914292B (en) 1992-03-25
IE911926A1 (en) 1991-12-18
AU8066391A (en) 1992-01-07
WO1991019596A1 (en) 1991-12-26
PT97959A (pt) 1993-08-31
US5551153A (en) 1996-09-03
CN1057225A (zh) 1991-12-25
GB9013047D0 (en) 1990-08-01
EP0543823A1 (de) 1993-06-02

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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